<html>
<head>
<script src="../../resources/js-test.js"></script>
</head>
<body>
<script>
var dt = document.implementation.createDocumentType("foo", "", "");
var iter = document.createNodeIterator(dt, NodeFilter.SHOW_ALL, null, true);
debug("NodeIterator rooted at a DocumentType node not yet associated with a document:");
shouldBe('iter.referenceNode.ownerDocument', 'document');
shouldBe('iter.nextNode()', 'dt');
shouldBe('iter.nextNode()', 'null');
shouldBe('iter.previousNode()', 'dt');
shouldBe('iter.previousNode()', 'null');
iter.detach();

iter = document.createNodeIterator(dt, NodeFilter.SHOW_ALL, null, true);
var d = document.implementation.createDocument(null, "doc", dt);
debug("\nNodeIterator rooted at a DocumentType node that becomes used by a document after the iterator has been created:");
shouldBe('iter.nextNode()', 'dt');
shouldBe('iter.previousNode()', 'dt');
debug("..and after removing it from the document:");
d.removeChild(dt);
shouldBe('iter.nextNode()', 'dt');
shouldBe('iter.previousNode()', 'dt');
iter.detach();
</script>
</body>
</html>
